#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#===============================================================================
# Copyright 2011 zod.yslin
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# 
# Author: zod.yslin
# Email: 
# File Name: next.py
# Description: 
#   next(iterator[, default])   回傳迭代器中下一個數值
# Edit History: 
#   2011-09-09    File created.
#===============================================================================
class Fibs:
    def __init__(self):
        self.i = 0
        self.j = 1
     
    def __str__(self):
        return str(self.i)
     
    def __iter__(self):
        return self
     
    def __next__(self):
        self.i, self.j = self.j, self.i + self.j
        return self.i
 
fibs = Fibs()
print(next(fibs))
print(next(fibs))
print(next(fibs))
print(next(fibs))
print(next(fibs))
print(next(fibs))
print(next(fibs))
print(next(fibs))
